Feank h



Pawntedsept; rasa f Y UNITED .STATES` FRANK H. BoLTn PATENT U '()Frlcr-L..

AND n.. o. GILJoHAnl'oirs'AMn rLAcn.

GREASE-CUP.

" SPECIFIGATION forming part of LetterspPatent No. 325,726. dated September 8i 1885.

Aptnmuon fue@ January 22, 1885. (No model.)

To all whom it may concern:

Beit known that I, AFRANK V.l1-BONNE, a

' citizen of the United States, residing.4 at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Grease-Gupsyand I do hereby declare the followingtov be a full, clear, and exact Vdescription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or iigures 'of reference marked thereon, which form a part of this specification. A

My invention relates to improvements in that class of lubricator-cups which are adapted to be used in lubricating machinery with grease or other heavy lubricant.

The object of my invention is to provide a device for automatically forcing the lubricant from the cup, without waste, slowly and uniformly, as the requirements of the machinery may demand.

The construction of my cup is explained by reference toV the accompanying drawings, in which. Figure l represents a vertical section. Fig. 2 is a bottom view of the upper cover.

Fig. 3 is a side View; and Fig. 4 represents a modication of Fig. 1.

Like parts are represented by the same reference-letters throughout the several views.

The receptacle A of the cup is preferably made of glass, cylindrical in form, andhaving metallic heads B B', which are held in place against the respective ends of the glass cylinder A by serew-bolts C. D is the neckof the cup, by which it is attached to the part oi' the machine to be lubricated, and through the duct E of which the lubricant escapes. The lubricant is forced from the cup by the piston F, which piston is actu ated bya coiled spring, G. They coiled spring G having been previously wound up, in recoiling turns the screw H. The screw in turning forces down the piston upon the lubricant. The inner end` of the coiled spring G is attached to the screw H within the slot I, and its outer end is attached to the cover K within a slot at J. Thusit is obvious that the screw H being atv rest, the spring G is wound up by turning the` cover K, and that when the spring is thus wound and the cover K is at rest, the screw Hwill be turned in the same direction as the cover by the recoil or` unwinding of the spring, whereby the piston is forced down uponthe lubricant. rJ'Jhe screw and inner` end of the spring may be prevented fromY turning as the spring is -wound by holding the protruding endof the screw. This, however, is seldom necessary, as the screw and piston are prevented from turn` ing when winding the spring by contact'of the piston with the lubricant ,and the side of the cup, while the friction of the screw. in the piston prevents it from turning but slowly as the lubricant escapes.

To prevent the coverK from turning back with the recoil of the outerend of the spring as it is wound, itis provided at its lower edge with a ratchet, M, the teeth of which, as the cover is turned, engage in the-catch or pawl N formed on'the upper surface of the stationary cover O. The cover O, whenattached to a glass cup, as in Fig'. l, is screwed to -the inner edge of the annular headB'; -but when aixed to the metallic cup shown in'Fig. tit is screwed to its periphery, asshown. ',In both forms of cup, when being filled, it becomes necessary to unscrew the cover O and withdraw it and the piston from the receptacle. The upper cover is loosely fitted to the protruding end of the screw, and it is retained in place thereon by the spiral spring Pand knob R. The office of the spring P is to hold the cover down, so that the ratchet-teeth M will engage in the catchor pawl N, while it yields to the upward movement of the cover sufiiciently to permit the teeth of the ratchet to pass over the catch or pawl N as the cover is turned.

VIn the modified form of cup shown in Fig. 4 a piston-rod, A', is substituted for the screw H, and a screw-thread is cut on the periphery of the piston,.which operates in a corresponding threadcut in the inner wall of the receptacle. A small bead, a, is formed on the side of the piston-rod A, which engages in a corresponding recess inthe piston, which causes the piston' to rotate with the rod. Thus it is obvious that as the spring recoils the piston and rod rotate together, and are thereby caused to move downward as the thread of the piston traverses the. thread of the receptacle. The form of cup shown in Fig. 1 is, however, preferr-ed.

Having thus described my invention, what IOO a central screWcut aperture, screw H, cover O, Spring G, and cover K, said spring being affixed at one end to said screw H, and at the other end to said cover, as set forth.

3. The combination, with the receptacle A, piston F, screw H, and spring G, of the cover O, provided with catch or paWl N, and the cover K, provided with the annular ratchet M, substantially as and for the purpose specified. 2o

4. The combination, with the cover O, provided With catch N and cover K, provided with ratchet M, engaging upon said pawl, of the spring P and knob R, said spring beinginterposed between said cover K and said 25 knob, and adapted to hold said Vratchet down upon said pawl While it yields to permit said ratchet to be turned over said pawl While Winding said spring, as set forth.

In testimony whereof I affix my signature 3o in presence of two Witnesses.

FRANK H. BOLTE.

i Witnesses:

JAs. B. ERWIN, G. M. GRIDLEY. 

